Date: Wed, 23 Dec 2015 11:15:26 -0500
From: Tejun Heo <tj@kernel.org>
To: serge.hallyn@ubuntu.com
Cc: linux-kernel@vger.kernel.org, adityakali@google.com,
        linux-api@vger.kernel.org, containers@lists.linux-foundation.org,
        cgroups@vger.kernel.org, lxc-devel@lists.linuxcontainers.org,
        akpm@linux-foundation.org, ebiederm@xmission.com,
        gregkh@linuxfoundation.org, lizefan@huawei.com, hannes@cmpxchg.org,
        Serge Hallyn <serge.hallyn@canonical.com>
Subject: Re: [PATCH 3/8] cgroup: introduce cgroup namespaces
Message-ID: <20151223161526.GG5003@mtj.duckdns.org>
References: <1450844609-9194-1-git-send-email-serge.hallyn@ubuntu.com>
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Hello,

On Tue, Dec 22, 2015 at 10:23:24PM -0600, serge.hallyn@ubuntu.com wrote:
...
> +char *cgroup_path(struct cgroup *cgrp, char *buf, size_t buflen)
> +{
> +	int ret;
> +	
> +	ret = cgroup_path_ns(cgrp, buf, buflen, current->nsproxy->cgroup_ns);
> +	if (ret < 0 || ret >= buflen)
> +		return NULL;
> +	return buf;
> +}
> +EXPORT_SYMBOL_GPL(cgroup_path);

Shouldn't this function check whether it's being called from a task
context?  e.g. it could be being called from an irq handler and may
end up scoping the path incorrectly.

Thanks.

-- 
tejun
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